Monday, August 22, 2011
Day 2: The Cannon "Barrel" Assembly is done
A hot day, sweaty work... but I got it done. The frame is finished. I even found enough time to start on the crank handle. The "cross" is made from 12 mm solid steel, 33cm at each side, strengthened by a 16 mm steel tube in the critical first 15 cm. This is all welded together, very strong.
Transmission of the crank is 26:1, means, if I go up to 500 kg (1100 lbs) of a draw, I have to pull with 19 kg (42 lbs) force at the end of the handles, very doable.
I decided to go with the clamp-on attachment method, will increase safety be using a round rod as an additional "wedge". This is the strongest known attachment method.
Tomorrow, the winch has to be finished, and the two drawing ropes have to be installed. With some luck, the weapon will be able to fire tomorrow evening. Wednesday is reserved for the carriage assembly.
Posted by The Slingshot Channel at 8:03 PM